Roadrunner sound - whirring / clacking

This is what a roadrunner sounds like. You can hear it throughout the video but especially at the end. They make other sounds as well (such as mating calls) but this is the clacking sound they make when they open their beaks. Another sound they make is a cooing sound, sort of like an owl. \r
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The video was taken at Pedernales Falls State Park near Austin, TX.